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batshit crazy 

A person who is batshit crazy is certifiably nuts. The phrase has origins in the old fashioned term "bats in the belfry." Old churches had a structure at the top called a belfry, which housed the bells. Bats are extremely sensitive to sound and would never inhabit a belfry of an active church where the bell was rung frequently. Occasionally, when a church was abandoned and many years passed without the bell being rung, bats would eventually come and inhabit the belfry. So, when somebody said that an individual had "bats in the belfry" it meant that there was "nothing going on upstairs" (as in that person's brain). To be BATSHIT CRAZY is to take this even a step further. A person who is batshit crazy is so nuts that not only is their belfry full of bats, but so many bats have been there for so long that the belfry is coated in batshit. Hence, the craziest of crazy people are BATSHIT CRAZY.
Dude that guy on the corner wears a tinfoil hat and ripped all the wires out of his house so the government couldn't listen to his thoughts.

Really?

Yeah, he's batshit crazy.
batshit crazy by KBLI August 20, 2009
A dull person, never achieve anything in his missions,forges certificates, pretends to attain or acquire certain level of education but in real fact not.
Person 1: Hello Bashite please provide us your CV please!
Bashite : Yeah you know the war against drug dealers is very challenging
Bashite by DiggBigg March 16, 2018
A level of insanity that the word alone cannot justify. Usable as a prefix ("Batshit insane") or on its own.

Popularised by Something Awful, before it was rubbish.
"That Gay Farmers For Jesus site is completely batshit."
batshit by Foul Egg January 20, 2003
To describe something/someone that is beyond crazy and insane.
In particular, insanity to the degree of being extreme.
Also is a way to describe someone who lacks any sense or rationality.
Also describes a state of being crazy.
Synonyms include: irrational, insane, crazy, extreme, delusional, lunatic, etc.
Wow, that bitch who picked a fight with me yesterday was batshit!

batshit eloquence 

When something expressed is so beyond crazy that it makes perfect sense.
As he stood on the street corner yelling out his innermost thoughts, the sheer batshit eloquence of it all swept me off my feet.
Off the deep end, crazy, insane. But worse.

See Gary Busey.
My mom has gone totally batshit; she tried to microwave our cat!
batshit by HolyHeartFailure September 22, 2005
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The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
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